Finding the Fourth Proportional to 21,939.52, 30,276.56 and 11,867.93

Step by Step Solution

1. Step 1: Write the proportion equation
   21,939.52 : 30,276.56 = 11,867.93 : x
2. Step 2: Convert to fraction form
   21,939.52/30,276.56 = 11,867.93/x
3. Step 3: Cross multiply
   21,939.52x = 30,276.56 × 11,867.93
4. Step 4: Simplify right side
   21,939.52x = 359,320,094.72
5. Step 5: Solve for x
   x = 359,320,094.72/21,939.52
6. Step 6: Final answer
   x = 16,377.76